As we were pondering this question -- and for the record, we love Twitter now as it is a great source of ideas and leads (thank goodness for TweetDeck) -- the answer appeared:

Too many Tweets occurs when too many people are Twittering rather than engaging in work, real conversation, spending time in thought without distraction, or simply doing nothing at all, resulting in Twitter collapsing under the weight like so much fence between gossiping neighbors who have leaned on it one too many times.
